Lifting-magnet.



C. E. FREDBRICKSON.

LIPTING MAGNET.

APPLICATION FILED JUNI; 11,1910.

fnv VENTOR C. E. IFREDERICKSON.

` LIFTING MAGNET.-

APPLIoA'rIoN FILED JUNI: 11. 1910.

974,047. Patented Oct. 25, 1 910.

2 SHEETS-SHEET 2.

Q Pc/ ll 'lT/V'ESSES:

UNITED 'stra'rns rarnNT OFFICE.

ULAYToN E. FaEDEaIcKsoN, or SAN FnANcIsco, CALIFORNIA, assreNon or TWENTY- FIVE PEB CENT. T0 GORDON` S. CHAMBERLIN AND THIRTY-SEVEN AND ONE-HALF 4Prix?. onNT. To EARL D. MGCADDAM, BOTH or SAN FRANCISCO, cALrrowvH LIFTING-MAGNET.

Specification of Letters Patent.

rai-,ouwe oef.. 2s, 191e.

Application led June 11, 1910. Serial No. 566,363.

To 'all whom 'it may concern:

Be it known that I, CLAYTON E. Fast.) ERICKSON residing at San Francisco, in the county of San Francisco and State of Cal1- fornia, have invented'certain new and useful Im rovements in Liftin -Magnets, of which t e following is a speci cation.

My invention is an improved lifting magnet especially designed for use in iftin .underreamer lugs, slips, drill rods, an other tools or devices thatl may be loose in oil1 or other'bored wells.

In its general make-np, my invention resides in 1providing a magnet of the consequent po ar solenoidal type, or tri-polar type, inclosed in a water-tight case,preferably of non-magnetic material, such as copper o'r the like.

The invention also includesa suitable saddle or 'cage inV which the magnet may be held, and by means of which 'the magnet may 'be l'wered to the Work and drawn up from the same. In its more subordinate nature, the invention also includes those novel details of construction, combination and arrangement of arts all of which will be first described, an then be specifically pointed out in the appended claims, reference being had tothe accompanying drawings, in which:

Figure 1, is-a sectional perspective view showing the use o'f my invention for removing. broken drill rods, or' other tools, from oil wells and the like. Fig. 2, is an enlarged central, vertical, longitudinal section of the device. Fig. 3, is an end view of the same. Fin'. 4, is a perspective view of the cage in w lich the ma net may be held for lowering it into an withdrawing it from the well. Fig. 5, is an'enlarged detail section of the up 'er end of the magnet, showin' how the ifti'ng cable may be secured directly to the casing head. Fig. 6, is a. detail enlarged sectional view showing the manner of seamiug vthe joints of the magnetvcasing.

Referring now to the accompanying drawin in which like letters and numerals of re erenee indicate like part-s in all of the figures, it will be noticed I 'take a copper, or other suitable tube 1, preferably of noninagnetic material, as the. core tullie. on which the magnet coils l0 are wound, so as to pro-l (copper, or other suitable material) .is

placed, and the tubes 1 and 3 are joined at their ends by head or ring plates 2 2 which are secured to the tubes 1 and 3 by. double seamed joints. 5 and subsequently soldered or welded together, as at 6, to effect a ti ht and strong Joint.. Thus it will be seen-tial:

the magnet coils l0 are housed in a watertight casing. The leading-in wires 1-0 of the coils 10 pass through water-tight insulation bushings 11 on one ofthe 'heads 2. In order to sustain the lifting magnet thus constructed, I prefer to provide a suitable cage whereby the lifting strain will be taken off of the case of the magnet as muchas possible. The casing 7 has a .base ring 7 having upwardly projected arms 7F that terminate at 7 and )0in with a swivel ri 0 7d to which the lifting cable 8 is .attac ed. In lieu of the cage, however, I may secure rings 9 by stra' s 9 and rivets Q", or otherwise, to the en heads 2,`to which the cable or rope may be secured.

In using my invention as a drill rod grab or for removing othertools from oil wells or the like, the magnet is lowered into the well over the tool, asv indicated in Fig. 1 of the drawings. The shank of the tool enters the inner tube l of the magnet and acts as a core for the ma net upon energizing the' coils thereof there y causing the core to travel with the magnet as it is lraised out of the well. By this means the tool, or otherarticle, picked up will be kept from engag- 1,lng the casing of the well and jamming If the article to be lifted out of" therein. the well is of less lengththan the magnet it ructically enter the tube and be conceale therein as the magnet is lifted up out of the well. Other -uses as well as the many advantages' of the invention will be readl apparent to those skilled in the art and it 1s not-thought necessary to enter into a further detailed discussimi thereof in this specification.

It is, of course,l undelstood that slight binaton and arrangement of parts ma.)7 be made without departing from the spirit of the invention, or the scope of the appended claims.

lVhat I claim is: A 1. A lifting magnet that includes a core tube, a pair of coils wound to present a consequent pole intermediate the ends of thev to form a housing for said coils.

2. A lifting magnet that includes a core tube, a' pair of coils, an outer tube and end closure rings to form a housing for said coils.

3. A lifting magnet that includes a core tube, a pair of coils Wound to presenta consequent polev intermediate the'ends of the magnet, an outer tube, end closure rings to form a housing for said coils, and means for securing said rings to said tube to effect water-tight. joints.

4. A lifting magnet that includes a core tube, u pair of coils, an outer tube, end closure rings to form a housing for said coils, and means for securin said rings to said tube to effect water-tig 1t joints.

5. A lifting magnet thatl includes a core magnet, an outer tube and end closure rings tube, n pair of coils wound to present a consequent pole intermediate the el'ids of the magnet, an outer tube, end closure rings to form a housing for said coils, said tubesJand saidheads being seamed together and secured to eiect Water-tight joints.,

tube, a. pair of coil-as, an outer tube, end closure rings to form a housing for said coils,

said tubes and said heads being;4 seamed to-.

6. A lifting magnet that includes a'coresaid ca 'e for suspending the same.

8. A ifting 'ma net thatincludes a coretube, apair of coi s, an outer tube, end closure rings to form a-housing for said coils,

a cage for holding said magnet, and a cable secured to said cage for suspending the same.

9. A liftin magnetthat includes a core tube, a pair o coils wound to present a consequent pole .intermediate the ends of the magnet, an outer tube, end closure rings to form a housingl for said coils, means for securing said rings to said tube to efl'ect watertight joints, a cage for holding said magnet, and a cable secured to said cage for suspending the same.

. 10. A lifting magnetthat includes a core tube, a pairof coils, an outer tube, end closure rings to form a housing for said coils, means for securing said rings to said tube to effect water-tight joints, a cage for l'iolding said-magnet',. and a .cable secured to said cage for suspending the same.

11. A lift-ing magnet that includes a core tube, a pair of coils wound to present a consequent pole intermediate the ends of the magnet, an outer tube, end closure rings to form a housing for said coils, said tubes and said heads being seamed together and secured'to effect .Water-tight joints, a cage forAIA holding said "magnet, and a cable secured to said cage for suspending the same.

12. A liftin magnet that includes a core tube, a pair o coils, an outer tube, end closure ringsto form a housing for said coils,`

said tubes and Said heads being seamed together and secured to effect- Watertight joints, acage for holdlng said magnet, and

'a cable secured to said cage for suspending the same.

CLAYTON E. FREDERICKSON. Titnessesz GEORGE S. CHAMBERLIN, EARL D. MCCADDAM. 

